Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License. See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
7# DECStation modifications by Paul M. Antoine, 1996
8# Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
9#
10# This file is included by the global makefile so that you can add your own
11# architecture-specific flags and dependencies. Remember to do have actions
12# for "archclean" cleaning up for this architecture.
13#
14
15KBUILD_DEFCONFIG := ip22_defconfig
16
17#
18# Select the object file format to substitute into the linker script.
19#
20ifdef CONFIG_CPU_LITTLE_ENDIAN
2132bit-tool-archpref = mipsel
2264bit-tool-archpref = mips64el
2332bit-bfd = elf32-tradlittlemips
2464bit-bfd = elf64-tradlittlemips
2532bit-emul = elf32ltsmip
2664bit-emul = elf64ltsmip
27else
2832bit-tool-archpref = mips
2964bit-tool-archpref = mips64
3032bit-bfd = elf32-tradbigmips
3164bit-bfd = elf64-tradbigmips
3232bit-emul = elf32btsmip
3364bit-emul = elf64btsmip
34endif
35
36ifdef CONFIG_32BIT
37tool-archpref = $(32bit-tool-archpref)
38UTS_MACHINE := mips
39endif
40ifdef CONFIG_64BIT
41tool-archpref = $(64bit-tool-archpref)
42UTS_MACHINE := mips64
43endif
44
45ifneq ($(SUBARCH),$(ARCH))
46 ifeq ($(CROSS_COMPILE),)
47 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
48 endif
49endif
50
51ifdef CONFIG_FUNCTION_GRAPH_TRACER
52 ifndef KBUILD_MCOUNT_RA_ADDRESS
53 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
54 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
55 endif
56 endif
57endif
58cflags-y += $(call cc-option, -mno-check-zero-division)
59
60ifdef CONFIG_32BIT
61ld-emul = $(32bit-emul)
62vmlinux-32 = vmlinux
63vmlinux-64 = vmlinux.64
64
65cflags-y += -mabi=32
66endif
67
68ifdef CONFIG_64BIT
69ld-emul = $(64bit-emul)
70vmlinux-32 = vmlinux.32
71vmlinux-64 = vmlinux
72
73cflags-y += -mabi=64
74endif
75
76all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
77all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
78all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
79
80#
81# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
82# code since it only slows down the whole thing. At some point we might make
83# use of global pointer optimizations but their use of $28 conflicts with
84# the current pointer optimization.
85#
86# The DECStation requires an ECOFF kernel for remote booting, other MIPS
87# machines may also. Since BFD is incredibly buggy with respect to
88# crossformat linking we rely on the elf2ecoff tool for format conversion.
89#
90cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
91cflags-y += -msoft-float
92LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
93KBUILD_AFLAGS_MODULE += -mlong-calls
94KBUILD_CFLAGS_MODULE += -mlong-calls
95
96cflags-y += -ffreestanding
97
98#
99# We explicitly add the endianness specifier if needed, this allows
100# to compile kernels with a toolchain for the other endianness. We
101# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
102# when fed the toolchain default!
103#
104# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
105# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
106# are used, so we kludge that here. A bug has been filed at
107# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
108#
109undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
110undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
111predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
112predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
113cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
114cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
115
116cflags-$(CONFIG_CPU_HAS_SMARTMIPS) += $(call cc-option,-msmartmips)
117
118cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
119 -fno-omit-frame-pointer
120
121#
122# CPU-dependent compiler/assembler options for optimization.
123#
124cflags-$(CONFIG_CPU_R3000) += -march=r3000
125cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
126cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
127cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
128cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
129cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
130cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
131cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
132 -Wa,-mips32 -Wa,--trap
133cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
134 -Wa,-mips32r2 -Wa,--trap
135cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
136 -Wa,-mips64 -Wa,--trap
137cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
138 -Wa,-mips64r2 -Wa,--trap
139cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
140cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
141 -Wa,--trap
142cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
143 -Wa,--trap
144cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
145 -Wa,--trap
146cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
147 -Wa,--trap
148cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
149 -Wa,--trap
150cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
151cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
152 -Wa,--trap
153cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
154ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
155cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
156endif
157cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
158cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
159
160cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
161cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
162cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
163
164ifdef CONFIG_CPU_SB1
165ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
166KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
167KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
168endif
169endif
170
171#
172# Firmware support
173#
174libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
175libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
176libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
177libs-y += arch/mips/fw/lib/
178
179#
180# Kernel compression
181#
182ifdef SYS_SUPPORTS_ZBOOT
183COMPRESSION_FNAME = vmlinuz
184else
185COMPRESSION_FNAME = vmlinux
186endif
187
188#
189# Board-dependent options and extra files
190#
191include $(srctree)/arch/mips/Kbuild.platforms
192
193ifdef CONFIG_PHYSICAL_START
194load-y = $(CONFIG_PHYSICAL_START)
195endif
196
197cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
198drivers-$(CONFIG_PCI) += arch/mips/pci/
199
200#
201# Automatically detect the build format. By default we choose
202# the elf format according to the load address.
203# We can always force a build with a 64-bits symbol format by
204# passing 'KBUILD_SYM32=no' option to the make's command line.
205#
206ifdef CONFIG_64BIT
207 ifndef KBUILD_SYM32
208 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
209 KBUILD_SYM32 = y
210 endif
211 endif
212
213 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
214 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
215 else
216 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
217 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
218 endif
219 endif
220endif
221
222KBUILD_AFLAGS += $(cflags-y)
223KBUILD_CFLAGS += $(cflags-y)
224KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
225KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
226
227LDFLAGS += -m $(ld-emul)
228
229ifdef CONFIG_MIPS
230CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
231 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
232 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
233ifdef CONFIG_64BIT
234CHECKFLAGS += -m64
235endif
236endif
237
238OBJCOPYFLAGS += --remove-section=.reginfo
239
240head-y := arch/mips/kernel/head.o
241
242libs-y += arch/mips/lib/
243
244# See arch/mips/Kbuild for content of core part of the kernel
245core-y += arch/mips/
246
247drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
248
249# suspend and hibernation support
250drivers-$(CONFIG_PM) += arch/mips/power/
251
252ifdef CONFIG_LASAT
253rom.bin rom.sw: vmlinux
254 $(Q)$(MAKE) $(build)=arch/mips/lasat/image $@
255endif
256
257#
258# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
259# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
260# convert to ECOFF using elf2ecoff.
261#
262vmlinux.32: vmlinux
263 $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
264
265
266#obj-$(CONFIG_KPROBES) += kprobes.o
267
268#
269# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
270# ELF files from 32-bit files by conversion.
271#
272vmlinux.64: vmlinux
273 $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
274
275all: $(all-y)
276
277# boot
278vmlinux.bin vmlinux.ecoff vmlinux.srec: $(vmlinux-32) FORCE
279 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
280
281# boot/compressed
282vmlinuz vmlinuz.bin vmlinuz.ecoff vmlinuz.srec: $(vmlinux-32) FORCE
283 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
284 VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $@
285
286
287CLEAN_FILES += vmlinux.32 vmlinux.64
288
289archprepare:
290ifdef CONFIG_MIPS32_N32
291 @echo ' Checking missing-syscalls for N32'
292 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
293endif
294ifdef CONFIG_MIPS32_O32
295 @echo ' Checking missing-syscalls for O32'
296 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
297endif
298
299install:
300 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
301ifdef CONFIG_SYS_SUPPORTS_ZBOOT
302 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
303endif
304 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
305 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
306
307archclean:
308 $(Q)$(MAKE) $(clean)=arch/mips/boot
309 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
310 $(Q)$(MAKE) $(clean)=arch/mips/lasat
311
312define archhelp
313 echo ' install - install kernel into $(INSTALL_PATH)'
314 echo ' vmlinux.ecoff - ECOFF boot image'
315 echo ' vmlinux.bin - Raw binary boot image'
316 echo ' vmlinux.srec - SREC boot image'
317 echo ' vmlinuz - Compressed boot(zboot) image'
318 echo ' vmlinuz.ecoff - ECOFF zboot image'
319 echo ' vmlinuz.bin - Raw binary zboot image'
320 echo ' vmlinuz.srec - SREC zboot image'
321 echo
322 echo ' These will be default as appropriate for a configured platform.'
323endef